<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        //一行打印五个星星
        // var str = '';
        // for(var i = 1;i <= 5;i++){
        //     str = str + '★';
        // }
        // console.log(str);
        var num = prompt('请输入星星的个数');
        var str = '';
        for(var i = 1;i <= num;i++){
            str = str + '★';
        }
        console.log(str);

    </script>
</head>
<body>
    
</body>
</html>